Hello,
I tried creating tiering with EC pools (EC pool as a cache for another
EC pool) and end up with "Error ENOTSUP: tier pool 'ecpool' is an ec
pool, which cannot be a tier". Having overwrite support on EC pools with
direct support by RBD and CephFS it may be worth having tiering using EC
pools (e.g. on SSDs). What others think about it? Maybe it is already
planned?
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